Mechanism for binding sheets in pack form



April 1958 w. BERBERICH 2,828,778

MECHANISM 'FOR BINDING SHEETS IN PACK FORM Filed May 8, 1953 4 Sheets-Sheet l 'v' 17 Z 127 50 |H 715 P277125 72 cm W. BERBERICH MECHANISM FOR BINDING SHEETS IN PACK FORM April 1, 1958 4 Sheets-Sheet 2 Filed May 8, 1953 April 1, 1958 w. BERBERICH 2,828,778

MECHANISM FOR BINDING SHEETS IN PACK FORM Filed May 8, 1955 4 Sheets-Sheet 5 Iva e72 for: WZZZ Berke/(ch April 1, 1953 w. BERBERICH 2,828,778

MECHANISM FOR BINDING SHEETS IN PACK FORM Filed May 8, 1953 4 Sheets-Sheet 4 3 2 7 I 2b Lg- 80 mcnANIsM FOR BINDING SHEETS IN PACK FORM Willi Berbench, Heilbronn (Necltar), Wurttemberg, Germany Application May 8, 1953, Serial No. 353,807

Claims priority, application Germany May 10, 1952 6 Claims. (Cl. 140-923) This invention relates to a mechanism for binding piles of sheets by winding a wire helix into the sheet pile provided with holes extending parallel to the back of the pile. It is an object of the invention to provide a mechanism comprising two parallel guided holding plates for the sheet pile, a form piece which can be engaged against the back of the sheet pile by means of a spring actuated member and which displaces the individual sheets in such a manner that the channels formed by the holes are given a curved formation corresponding to the diameter of the Wire helix, and means for holding the feed device for the wire helix in operative position until the necessary length of Wire helix has been wound in.

In a copending application the wire helix is guided over a mandrel by means of a driven friction wheel which is pivotally mounted and can be forced against the action of a spring against the wire helix by means of an actuating member attached to a lever carrying the said mandrel. A portion of this lever constitutes together with another lever a latch by means of which the'friction Wheel after actuation of its operating member is held in engaged position, and after winding in of the necessary length of the wire helix, is released by a feeler member actuated by the beginning of the wire helix whereby the spring for retracting the friction wheel is released. In my prior copending application Serial No. 241,995, filed August 15, 1951, the form piece is removably attached to a slide which is movable longitudinally in guides in the frame of the mechanism in such a manner that the form piece can be approached toward and retracted from the back of the sheet pile. The slide is attached to an operating member, for example a toggle, and is also under the action of a spring causing the form piece to be pressed against the back of the sheet pile. When the sheet pile is inserted and positioned to receive the wire helix, the form piece must be in its operative position, whereas it must be retracted from the sheet pile during the winding in of the wire helix, since it lies in the path of the wire helix, in its Working position.

The object of the present invention is therefore to provide means for automatically insuring that the form piece will be in a position of rest during the winding in of the wire helix and therefore out of the path of the latter.

The arrangement according to the present invention has also other advantages. In the mechanism according to my said copending application Serial No. 241,995, the holding plates for the sheet pile are provided at suitable longitudinal edges with a comb engaging the wire helix to be wound in, and along the comb of one holding plate there is provided a rod member of preferably circular cross section, jointed to this holding plate and acted upon by torsion springs for the purpose of insuring that the beginning of the wire helix will reliably engage the tooth gaps of one of the combs. This rod member, for adaptation to Wire helices of difierent diameters, is pivotally mounted and can be rocked manually against the rates Patent IQQ action of the torsion springs. This is necessary when inserting the sheet pile because it covers the intervals between the teeth of the comb and thus obstructs vision of the holes in the sheet pile, which have to be aligned with the tooth gaps.

A further object of the invention therefore is to control the rod member in such a manner that during the winding in of the wire helix it is in its operative position whereas during the insertion and positioning of the sheet pile it is out of the path of the wire helix to be wound in, and to mount the rod member in such a manner that its position can be adapted for wire helices of difierent diameter notwithstanding that it has to be able to effect the said movements.

According to the present invention the form piece is coupled to the actuating member, for example a pedal, for feeding the wire helix, in such a manner that on engaging the feed device the form piece will be retracted from the holding plates and brought into position of rest, also locked in this position by locking means which latter by means of a further actuating member, for example a toggle device, is releasable independently of the wire helix feed.

Preferably this locking means is in the form of a medially pivoted lever jointed to a slide carrying the form piece, one of the arms of which lever carries a locking lug and the other arm of which can be actuated by the second operating means against the action of a spring, in the unlocking direction.

For exact adjustment of the locking it is preferable that the slide be provided with an adjustable locking plate carrying the stop cooperating with the locking lug.

The invention also provides means for actuating the rod member in the desired manner so that it will be ad justable transversely to the longitudinal direction of the frame of the mechanism and is positively connected to the form piece in such a manner that on retracting the form piece it is brought out of its position of rest in which it is out of the path of the wire helix to be wound in, into the path of the comb for inserting the wire helix, and vice versa. Use is also made of the circumstance that the rod member must be in its Working position when the form piece is in its position of rest, and vice versa.

The rod member is carried by levers which are fixed to a pivot rod mounted at its ends in links which are fixed in a second pivot rod mounted in a plate. This second pivot rod has a lever attached thereto carrying a preferably adjustable stop for limiting the rocking of the first pivot about the second. Furthermore, there is fixed on the first pivot a lever carrying a preferably adjustable sec 0nd stop which limits the spacing of the rod member from the comb. The rod member is preferably adjustable in its supporting levers.

A mechanism embodying the invention is illustrated by way of example in the accompanying drawings, in which Figure 1 is a side elevation of the mechanism partly in section,

Figure 2 is a cross section taken on line H-II of Figure 1,

Figures 3 and 4 are end views of the detail ofthe rod member and its mounting in the winding direction for the wire helix,

Figure 5 is a cross section taken on line V-V ure 1,

Figure 6 is a cross section taken on line VI--Vl of'Fig ure 1,

Fig. 7 is a perspective view on an enlarged scale" sh'owing the various details, A

Fig. 8 is a side elevation partly in section showings'orne of the details of Fig. 2 on an enlarged scale, and

of Fig Fig. 9 is a plan view showing the friction wheel and its cooperation with the mandrel and the drive.

The mechanism comprises a frame 1 on which is attached a holding plate 2 for a pile of sheets 3, by means of holding bars 4 slidable in bosses 5 in the frame and capable of being fixed in desired position.

Parallel to the holding plate 2 and adjustably spaced therefrom is a second holding plate 7. The holding plates 2 and 7 are provided at corresponding longitudinal edges each with a comb 2b and 7b, respectively, the tooth pitch of which corresponds to the pitch of the wire helix 16 to be wound in. The sheet pile 3 is provided in known manner with perforations parallel to its back so that the sheet pile presents a number of hole channels arranged sideby-side in a straight line and aligned with the tooth gaps of the combs 2b and 7b. Opposite the back of the clamped sheet pile 3 there is arranged a form piece 17, the purpose of which is to shape the back of the sheet pile 3 in such a manner that the individual sheets of the pile are displaced to arrange the hole channels in a curved formation corresponding to the diameter of the wire helix 16. This form piece 17 is removably attached by means of a screw 19 to a slide 18 which is slidable longitudinally in a guide 20 in the frame 1 in such a manner that the form piece 17 can be approached to and retracted from the back of the sheet pile 3. The slide 18 is actuated by a spring 24, referred to further hereinafter, which urges it in the direction to hold the form piece 17 against the back of the sheet pile. In order to insert the wire helix in the sheet pile 3 and to give it the necessary movement for winding it in, the frame 1 carries a mandrel 33 having its axis extending in the Winding in direction. The wire helix 16 which is fed into the mechanism as an endless helix, is guided over this mandrel 33. The feed is effected by a driven friction wheel 34 which preferably has a roughened surface for which purpose it may be provided with a suitable overlay. This friction wheel is pressed against the wire helix 16 guided on the mandrel 33 as long as the wire helix is to be wound in. The friction wheel 34 is arranged at the end of a lever 36 which can rock about the axis of a shaft and is driven by means of a belt pulley 43 from this shaft.

The lever 36 has attached thereto a rod 45 by means of which the friction wheel 34 is urged by a spring 46 against the part of the wire helix on the mandrel 33. The rod 45 can be actuated by a suitable member, for example a pedal 45'. The rod 45 is provided with a stop 47, ad justably mounted thereon, which encounters a part of the table 21 carrying the mechanism when the friction wheel 34 is pressed by the spring 46 against the part of the wire helix 16 on the mandrel 33.

According to said copending application Serial No. 241,995, a portion of the lever 36 together with another lever constitutes a latch which holds the friction wheel 34, after engagement, by means of the pedal 45, in its operative position, and after Winding in of the necessary length of wire helix it is released by a feeler member actuated by the beginning of the wire helix, whereby the friction wheel 34 is retracted.

According to the present invention the slide 18 carrying the form piece 17 is attached to a tension wire 101 guided over rollers 100 and leading to the pedal 45' which engages the feed for the wire helix, in such a manner that on engaging the feed for the wire helix 16, the form piece 17 is retracted from the holding plates 2 and 7 and brought into the position of rest. By means of a latch member 102, Fig. 2, the slide 18 is locked in rest position. The latch member 102 is jointed to the slide 13 working in the guide 20 and carrying the form piece 17, and it constitutes a medially pivoted lever, one arm of which carries a locking lug 103 and the other arm of which can be actuated in the unlocking direction by means of a tension member 104 and a second actuating member, for example, a toggle lever 105, Fig. 1, said operation being against the action of a spring 106. The slide 18 carries alatch plate 108 adjustably mounted thereon by means of a slot 109 and a. screw 110, which plate carries a notch 107 cooperating with the lug 103.

By these means on actuation of the lever 45' the feed of the wire helix 16 is engaged and simultaneously the form piece 17 is automatically brought to its position of rest, that is, out of the path of the wire helix 16, so that the latter can be wound in without obstruction. On automatic stopping of the wire helix feed by releasing the locking means which hold the friction wheel 34 in operative position, the form piece 17 remains, owing to its locking, in a position of rest so that it cannot be pressed against the wound in wire helix. It is only after retraction of the sheet pile 3 with the wound in wire helix 16, that the toggle is actuated and the form piece 17 brought intoits operative position, in which the insertion of the next sheet pile between the plates 2 and 7 takes place.

The feed of the wire helix 16 is eifected by means comprising a rod member 28 carried by levers 111 fixed to a pivot rod 30 supported at its ends by links 112 which are pivoted on pins 113 fixed to the plate 7. The pivot 113 has fixed thereto a lever 114 carrying a preferably adjustable stop 115 which may be in the form of a screw held by a lock nut 116. This stop 115 limits the rocking of the pivot rod 30 about the pivot 113. Fixed on the rod 30 is a lever 117 also having an adjustable stop 118 constituted by a screw and lock nut 119. The stop 118 determines the distance of the rod member 28 from the comb 7b.

Preferably the rod member 28 is adjustably mounted in the levers 111, by providing strips 120 with slots 121 traversed by screws 122 engaging the levers 111.

On the pivot rod 30 there is preferably jointedly mounted a tension member 123 connected with interposition of a spring 24 to a part 18 of the slide 18. Also between the spring 24 and the tension member 123 an adjusting device is interposed consisting of a screwthreaded rod 126 engaging a nut 124 connected to the tension member 123, and also engaging a nut 125 connected to the spring 24. Also a pair of torsion springs 127 is arranged on the pivot rod 30, one end of said springs 127 bearing on the levers 111, and the other end on the pivot 113. By these means the rod member 128 is urged in the direction of the comb 7b as far as permitted by the stop 118. When the pedal 45' is actuated to engage the helix wire feed and the form piece 17 is brought into position of rest in which it is locked by the locking means 103, then the positive connection of the rod member 38 to the form piece 17 over the tension member 1 23, the screw spindle 126, the spring 24, and the part 18' of the slide 18, brings the rod member 28 into its working position. This working position is determined by the stops 115 and 118 and therefore can be adjusted for different diameters of wire helices 16. This adjustability of the working position of the rod member 28 has the further advantage that the wire helix 16 against which it bears cannot be displaced out of its axis. When the feed of the wire helix 16, as above described, is disengaged, the form piece 17 remains in position of rest and the rod member 28 is in operative position. It is only after disengaging the lock means 103 by means of the toggle 105, which as above described is only possible after removal of the sheet pile 3 with wound in wire helix 16, that the form piece 17 can be brought into its working position, and the rod member 28 be brought into its position of rest. Many of the parts referred to in the foregoing are clearly and fully shown and described in my said copending application Serial No. 241,995 in which for most of the parts the same reference characters have been used. I claim as my invention:

1. A machine for binding a plurality of perforated sheets with helically-shaped wire binders comprising a frame, a friction wheel rotatably mounted on an axis and adapted to contact the wire binder to rotate the latter so that the helical wire binder will be forwarded in a helical form, means for mounting the friction wheel so that it can be adjusted away from and out of contact with the wire binder, a spring connected to the frame and operative to hold the friction wheel out of contact with the wire binder, a form piece against which the backs of the sheets abut so that the sheets may assume a curved position relative to the backs of all the sheets, means to adjust the form piece away from the backs of the sheets, a spring connected to urge the form piece against the backs of the sheets, and actuating means connected to operate the friction wheel and the form piece and operative to simultaneously actuate the friction wheel and the form piece against the forces of their springs.

2. A machine according to claim 1, in which a latch member is provided connected to lock the form piece in a position spaced out of contact with the backs of the sheets.

3. A machine according to claim 1, in which a latch member is provided connected to lock the form piece in a position spaced out of contact with the backs of the sheets, and in which an actuating lever is provided connected to operate the latch member.

4. A machine according to claim 1, in which a single tension wire is provided as a part of the actuating means for the friction wheel and the form piece.

5. A machine according to claim 1, in which the lastmentioned means includes a pedal to actuate both the friction wheel and the form piece.

6. A machine according to claim 1, in which a latch member is provided connected to lock the form piece in a position spaced out of contact with the backs of the sheets, and in which an actuating lever is provided connected to operate the latch member, said actuating lever being in the form of a pivoted arm operable by a knee of the operator.

References Cited in the file of this patent UNITED STATES PATENTS 1,813,035 Draeger July 7, 1931 1,986,757 Eden Ian. 1, 1935 2,300,544 Freundlich Nov. 3, 1942 2,532,443 Freundlich Dec. 5, 1950 2,649,120 November Aug. 18, 1953 2,730,142 Berberich Ian. 10, 1956 

